The Four Brainstates

[SilverInfinity]

On top of my head, they are Theta, Beta, Alpha, and Delta. Anyways, here is a web-page about these four brainstates, including their functions, and how to achieve them:

http://www.toolsforwellness.com/brainstates.html

[Astrojewels]

Good site SI, because understanding how your own brain waves works provides understanding of how you have been programmed and the ways in which they are able to perform recurring bombardment.